youthful

Youthful means being full of energy and life, often with a sense of freshness and enthusiasm.

When we describe someone or something as youthful, we usually mean that it's not old-fashioned or out of touch. We might say that a young person has a youthful spirit, meaning they're adventurous and open to new experiences. Or we could describe a design or style as youthful, implying that it's modern and trendy. Sometimes people also use the word "youthful" to mean something that reminds them of their own youth - like a favorite childhood book or movie that still holds up today. For example, if someone says they're feeling very youthful after taking a trip abroad, they might be saying that it made them feel more energetic and carefree.